Does a single user need a subscription?

No. When only one user in your Pipedrive company uses OneClick, your company uses the OneClick Solo plan. This plan has one seat and is free. Install OneClick from the Pipedrive Marketplace. See Install OneClick as a global admin.

When a second user must use the Buttons, your company needs the OneClick Teams plan. With this plan, you pay a monthly price for each seat, also for the first seat. The Subscription tab shows the price of a seat. See Subscription.

If a OneClick Partner helps your company, your company can have the OneClick Partner plan. The Partner then gives the seats. Ask your Partner to add or remove seats.